Tiktaalik

Tiktaalik is an extinct fossil species that lived about 375 million years ago, representing a key transitional form between fish and early land vertebrates. It had features of both aquatic and terrestrial animals, including fins with bones similar to limbs, a neck allowing head movement, and lungs for breathing air. These adaptations suggest Tiktaalik could navigate shallow water and possibly move onto land. Its discovery helps scientists understand how vertebrates transitioned from living solely in water to moving onto land, marking a crucial step in vertebrate evolution.